My two cents worth on the salts I have tried. I started using Instant Ocean it was ok but I was changing over to a reef tank from FOWLR
so I tried Coralife since I can get it cheap at Petsmart. Got bad Calcium deposites and had to clean my air hose on my skimmer every night because of calcium clogging it. SeaChem really had no problem other the low Alkalinity. Changed to Reef Crystals since a lot of people use it and like it. It was ok fought cyano
the whole time I used it. Then I was doing some reading on other salts. Decided to try Red Sea Coral Pro because its "supposed" to be made to use with RO
water. All I can say is WOW all my corals are bigger and more colorful than ever before. Some of the corals started looking bleached while using Reef Crystals all color and then some is back with Red Sea Coral Pro. I have found my SALT!